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Commit | Line | Data |
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3e7ee490 | 1 | /* |
3e7ee490 HJ |
2 | * Copyright (c) 2009, Microsoft Corporation. |
3 | * | |
4 | * This program is free software; you can redistribute it and/or modify it | |
5 | * under the terms and conditions of the GNU General Public License, | |
6 | * version 2, as published by the Free Software Foundation. | |
7 | * | |
8 | * This program is distributed in the hope it will be useful, but WITHOUT | |
9 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
10 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for | |
11 | * more details. | |
12 | * | |
13 | * You should have received a copy of the GNU General Public License along with | |
14 | * this program; if not, write to the Free Software Foundation, Inc., 59 Temple | |
15 | * Place - Suite 330, Boston, MA 02111-1307 USA. | |
16 | * | |
17 | * Authors: | |
18 | * Haiyang Zhang <haiyangz@microsoft.com> | |
19 | * Hank Janssen <hjanssen@microsoft.com> | |
3e7ee490 | 20 | */ |
5654e932 | 21 | #include <linux/kernel.h> |
a0086dc5 | 22 | #include <linux/mm.h> |
5a0e3ad6 | 23 | #include <linux/slab.h> |
4983b39a | 24 | #include "osd.h" |
645954c5 | 25 | #include "logging.h" |
3e7ee490 HJ |
26 | #include "VmbusPrivate.h" |
27 | ||
454f18a9 | 28 | /* Internal routines */ |
aded7165 | 29 | static int VmbusChannelCreateGpadlHeader( |
f4266e34 GKH |
30 | void *Kbuffer, /* must be phys and virt contiguous */ |
31 | u32 Size, /* page-size multiple */ | |
aded7165 | 32 | struct vmbus_channel_msginfo **msgInfo, |
f4266e34 | 33 | u32 *MessageCount); |
aded7165 GKH |
34 | static void DumpVmbusChannel(struct vmbus_channel *channel); |
35 | static void VmbusChannelSetEvent(struct vmbus_channel *channel); | |
3e7ee490 HJ |
36 | |
37 | ||
38 | #if 0 | |
f4266e34 | 39 | static void DumpMonitorPage(struct hv_monitor_page *MonitorPage) |
3e7ee490 | 40 | { |
f4266e34 GKH |
41 | int i = 0; |
42 | int j = 0; | |
3e7ee490 | 43 | |
f4266e34 GKH |
44 | DPRINT_DBG(VMBUS, "monitorPage - %p, trigger state - %d", |
45 | MonitorPage, MonitorPage->TriggerState); | |
3e7ee490 | 46 | |
f4266e34 GKH |
47 | for (i = 0; i < 4; i++) |
48 | DPRINT_DBG(VMBUS, "trigger group (%d) - %llx", i, | |
49 | MonitorPage->TriggerGroup[i].AsUINT64); | |
3e7ee490 | 50 | |
f4266e34 GKH |
51 | for (i = 0; i < 4; i++) { |
52 | for (j = 0; j < 32; j++) { | |
53 | DPRINT_DBG(VMBUS, "latency (%d)(%d) - %llx", i, j, | |
54 | MonitorPage->Latency[i][j]); | |
3e7ee490 HJ |
55 | } |
56 | } | |
f4266e34 GKH |
57 | for (i = 0; i < 4; i++) { |
58 | for (j = 0; j < 32; j++) { | |
59 | DPRINT_DBG(VMBUS, "param-conn id (%d)(%d) - %d", i, j, | |
60 | MonitorPage->Parameter[i][j].ConnectionId.Asu32); | |
61 | DPRINT_DBG(VMBUS, "param-flag (%d)(%d) - %d", i, j, | |
62 | MonitorPage->Parameter[i][j].FlagNumber); | |
3e7ee490 HJ |
63 | } |
64 | } | |
65 | } | |
66 | #endif | |
67 | ||
f4266e34 GKH |
68 | /** |
69 | * VmbusChannelSetEvent - Trigger an event notification on the specified channel. | |
70 | */ | |
aded7165 | 71 | static void VmbusChannelSetEvent(struct vmbus_channel *Channel) |
3e7ee490 | 72 | { |
eacb1b4d | 73 | struct hv_monitor_page *monitorPage; |
3e7ee490 HJ |
74 | |
75 | DPRINT_ENTER(VMBUS); | |
76 | ||
f4266e34 | 77 | if (Channel->OfferMsg.MonitorAllocated) { |
454f18a9 | 78 | /* Each u32 represents 32 channels */ |
7c369f40 BP |
79 | set_bit(Channel->OfferMsg.ChildRelId & 31, |
80 | (unsigned long *) gVmbusConnection.SendInterruptPage + | |
f4266e34 | 81 | (Channel->OfferMsg.ChildRelId >> 5)); |
3e7ee490 | 82 | |
f4266e34 | 83 | monitorPage = gVmbusConnection.MonitorPages; |
454f18a9 | 84 | monitorPage++; /* Get the child to parent monitor page */ |
3e7ee490 | 85 | |
7c369f40 | 86 | set_bit(Channel->MonitorBit, |
f4266e34 GKH |
87 | (unsigned long *)&monitorPage->TriggerGroup |
88 | [Channel->MonitorGroup].Pending); | |
7c369f40 | 89 | |
f4266e34 | 90 | } else { |
3e7ee490 HJ |
91 | VmbusSetEvent(Channel->OfferMsg.ChildRelId); |
92 | } | |
93 | ||
94 | DPRINT_EXIT(VMBUS); | |
95 | } | |
96 | ||
97 | #if 0 | |
aded7165 | 98 | static void VmbusChannelClearEvent(struct vmbus_channel *channel) |
3e7ee490 | 99 | { |
eacb1b4d | 100 | struct hv_monitor_page *monitorPage; |
3e7ee490 HJ |
101 | |
102 | DPRINT_ENTER(VMBUS); | |
103 | ||
f4266e34 | 104 | if (Channel->OfferMsg.MonitorAllocated) { |
454f18a9 | 105 | /* Each u32 represents 32 channels */ |
7c369f40 | 106 | clear_bit(Channel->OfferMsg.ChildRelId & 31, |
f4266e34 GKH |
107 | (unsigned long *)gVmbusConnection.SendInterruptPage + |
108 | (Channel->OfferMsg.ChildRelId >> 5)); | |
3e7ee490 | 109 | |
f4266e34 GKH |
110 | monitorPage = |
111 | (struct hv_monitor_page *)gVmbusConnection.MonitorPages; | |
454f18a9 | 112 | monitorPage++; /* Get the child to parent monitor page */ |
3e7ee490 | 113 | |
7c369f40 | 114 | clear_bit(Channel->MonitorBit, |
f4266e34 GKH |
115 | (unsigned long *)&monitorPage->TriggerGroup |
116 | [Channel->MonitorGroup].Pending); | |
3e7ee490 HJ |
117 | } |
118 | ||
119 | DPRINT_EXIT(VMBUS); | |
120 | } | |
121 | ||
122 | #endif | |
f4266e34 GKH |
123 | /** |
124 | * VmbusChannelGetDebugInfo -Retrieve various channel debug info | |
125 | */ | |
aded7165 GKH |
126 | void VmbusChannelGetDebugInfo(struct vmbus_channel *Channel, |
127 | struct vmbus_channel_debug_info *DebugInfo) | |
3e7ee490 | 128 | { |
eacb1b4d | 129 | struct hv_monitor_page *monitorPage; |
f4266e34 GKH |
130 | u8 monitorGroup = (u8)Channel->OfferMsg.MonitorId / 32; |
131 | u8 monitorOffset = (u8)Channel->OfferMsg.MonitorId % 32; | |
454f18a9 | 132 | /* u32 monitorBit = 1 << monitorOffset; */ |
3e7ee490 HJ |
133 | |
134 | DebugInfo->RelId = Channel->OfferMsg.ChildRelId; | |
135 | DebugInfo->State = Channel->State; | |
f4266e34 GKH |
136 | memcpy(&DebugInfo->InterfaceType, |
137 | &Channel->OfferMsg.Offer.InterfaceType, sizeof(struct hv_guid)); | |
138 | memcpy(&DebugInfo->InterfaceInstance, | |
139 | &Channel->OfferMsg.Offer.InterfaceInstance, | |
140 | sizeof(struct hv_guid)); | |
3e7ee490 | 141 | |
eacb1b4d | 142 | monitorPage = (struct hv_monitor_page *)gVmbusConnection.MonitorPages; |
3e7ee490 HJ |
143 | |
144 | DebugInfo->MonitorId = Channel->OfferMsg.MonitorId; | |
145 | ||
f4266e34 GKH |
146 | DebugInfo->ServerMonitorPending = |
147 | monitorPage->TriggerGroup[monitorGroup].Pending; | |
148 | DebugInfo->ServerMonitorLatency = | |
149 | monitorPage->Latency[monitorGroup][monitorOffset]; | |
150 | DebugInfo->ServerMonitorConnectionId = | |
151 | monitorPage->Parameter[monitorGroup] | |
152 | [monitorOffset].ConnectionId.u.Id; | |
3e7ee490 HJ |
153 | |
154 | monitorPage++; | |
155 | ||
f4266e34 GKH |
156 | DebugInfo->ClientMonitorPending = |
157 | monitorPage->TriggerGroup[monitorGroup].Pending; | |
158 | DebugInfo->ClientMonitorLatency = | |
159 | monitorPage->Latency[monitorGroup][monitorOffset]; | |
160 | DebugInfo->ClientMonitorConnectionId = | |
161 | monitorPage->Parameter[monitorGroup] | |
162 | [monitorOffset].ConnectionId.u.Id; | |
3e7ee490 HJ |
163 | |
164 | RingBufferGetDebugInfo(&Channel->Inbound, &DebugInfo->Inbound); | |
165 | RingBufferGetDebugInfo(&Channel->Outbound, &DebugInfo->Outbound); | |
166 | } | |
167 | ||
f4266e34 GKH |
168 | /** |
169 | * VmbusChannelOpen - Open the specified channel. | |
170 | */ | |
171 | int VmbusChannelOpen(struct vmbus_channel *NewChannel, u32 SendRingBufferSize, | |
172 | u32 RecvRingBufferSize, void *UserData, u32 UserDataLen, | |
79035069 | 173 | void (*OnChannelCallback)(void *context), void *Context) |
3e7ee490 | 174 | { |
82250213 | 175 | struct vmbus_channel_open_channel *openMsg; |
aded7165 | 176 | struct vmbus_channel_msginfo *openInfo; |
3e7ee490 | 177 | void *in, *out; |
dd0813b6 | 178 | unsigned long flags; |
f4266e34 | 179 | int ret; |
3e7ee490 HJ |
180 | |
181 | DPRINT_ENTER(VMBUS); | |
182 | ||
454f18a9 | 183 | /* Aligned to page size */ |
f4266e34 GKH |
184 | ASSERT(!(SendRingBufferSize & (PAGE_SIZE - 1))); |
185 | ASSERT(!(RecvRingBufferSize & (PAGE_SIZE - 1))); | |
3e7ee490 | 186 | |
79035069 | 187 | NewChannel->OnChannelCallback = OnChannelCallback; |
3e7ee490 HJ |
188 | NewChannel->ChannelCallbackContext = Context; |
189 | ||
454f18a9 | 190 | /* Allocate the ring buffer */ |
f4266e34 GKH |
191 | out = osd_PageAlloc((SendRingBufferSize + RecvRingBufferSize) |
192 | >> PAGE_SHIFT); | |
3e7ee490 | 193 | ASSERT(out); |
c4b0bc94 | 194 | ASSERT(((unsigned long)out & (PAGE_SIZE-1)) == 0); |
3e7ee490 | 195 | |
f4266e34 | 196 | in = (void *)((unsigned long)out + SendRingBufferSize); |
3e7ee490 HJ |
197 | |
198 | NewChannel->RingBufferPages = out; | |
f4266e34 GKH |
199 | NewChannel->RingBufferPageCount = (SendRingBufferSize + |
200 | RecvRingBufferSize) >> PAGE_SHIFT; | |
3e7ee490 HJ |
201 | |
202 | RingBufferInit(&NewChannel->Outbound, out, SendRingBufferSize); | |
203 | ||
204 | RingBufferInit(&NewChannel->Inbound, in, RecvRingBufferSize); | |
205 | ||
454f18a9 | 206 | /* Establish the gpadl for the ring buffer */ |
f4266e34 GKH |
207 | DPRINT_DBG(VMBUS, "Establishing ring buffer's gpadl for channel %p...", |
208 | NewChannel); | |
3e7ee490 HJ |
209 | |
210 | NewChannel->RingBufferGpadlHandle = 0; | |
211 | ||
212 | ret = VmbusChannelEstablishGpadl(NewChannel, | |
f4266e34 GKH |
213 | NewChannel->Outbound.RingBuffer, |
214 | SendRingBufferSize + | |
215 | RecvRingBufferSize, | |
216 | &NewChannel->RingBufferGpadlHandle); | |
217 | ||
218 | DPRINT_DBG(VMBUS, "channel %p <relid %d gpadl 0x%x send ring %p " | |
219 | "size %d recv ring %p size %d, downstreamoffset %d>", | |
220 | NewChannel, NewChannel->OfferMsg.ChildRelId, | |
221 | NewChannel->RingBufferGpadlHandle, | |
222 | NewChannel->Outbound.RingBuffer, | |
223 | NewChannel->Outbound.RingSize, | |
224 | NewChannel->Inbound.RingBuffer, | |
225 | NewChannel->Inbound.RingSize, | |
226 | SendRingBufferSize); | |
3e7ee490 | 227 | |
454f18a9 | 228 | /* Create and init the channel open message */ |
f4266e34 GKH |
229 | openInfo = kmalloc(sizeof(*openInfo) + |
230 | sizeof(struct vmbus_channel_open_channel), | |
231 | GFP_KERNEL); | |
3e7ee490 HJ |
232 | ASSERT(openInfo != NULL); |
233 | ||
bfc30aae | 234 | openInfo->WaitEvent = osd_WaitEventCreate(); |
3e7ee490 | 235 | |
82250213 | 236 | openMsg = (struct vmbus_channel_open_channel *)openInfo->Msg; |
f4266e34 GKH |
237 | openMsg->Header.MessageType = ChannelMessageOpenChannel; |
238 | openMsg->OpenId = NewChannel->OfferMsg.ChildRelId; /* FIXME */ | |
239 | openMsg->ChildRelId = NewChannel->OfferMsg.ChildRelId; | |
240 | openMsg->RingBufferGpadlHandle = NewChannel->RingBufferGpadlHandle; | |
241 | ASSERT(openMsg->RingBufferGpadlHandle); | |
242 | openMsg->DownstreamRingBufferPageOffset = SendRingBufferSize >> | |
243 | PAGE_SHIFT; | |
244 | openMsg->ServerContextAreaGpadlHandle = 0; /* TODO */ | |
3e7ee490 HJ |
245 | |
246 | ASSERT(UserDataLen <= MAX_USER_DEFINED_BYTES); | |
247 | if (UserDataLen) | |
3e7ee490 | 248 | memcpy(openMsg->UserData, UserData, UserDataLen); |
3e7ee490 | 249 | |
dd0813b6 | 250 | spin_lock_irqsave(&gVmbusConnection.channelmsg_lock, flags); |
53af545b BP |
251 | list_add_tail(&openInfo->MsgListEntry, |
252 | &gVmbusConnection.ChannelMsgList); | |
dd0813b6 | 253 | spin_unlock_irqrestore(&gVmbusConnection.channelmsg_lock, flags); |
3e7ee490 HJ |
254 | |
255 | DPRINT_DBG(VMBUS, "Sending channel open msg..."); | |
256 | ||
f4266e34 GKH |
257 | ret = VmbusPostMessage(openMsg, |
258 | sizeof(struct vmbus_channel_open_channel)); | |
259 | if (ret != 0) { | |
3e7ee490 HJ |
260 | DPRINT_ERR(VMBUS, "unable to open channel - %d", ret); |
261 | goto Cleanup; | |
262 | } | |
263 | ||
454f18a9 | 264 | /* FIXME: Need to time-out here */ |
bfc30aae | 265 | osd_WaitEventWait(openInfo->WaitEvent); |
3e7ee490 HJ |
266 | |
267 | if (openInfo->Response.OpenResult.Status == 0) | |
3e7ee490 | 268 | DPRINT_INFO(VMBUS, "channel <%p> open success!!", NewChannel); |
3e7ee490 | 269 | else |
f4266e34 GKH |
270 | DPRINT_INFO(VMBUS, "channel <%p> open failed - %d!!", |
271 | NewChannel, openInfo->Response.OpenResult.Status); | |
3e7ee490 HJ |
272 | |
273 | Cleanup: | |
dd0813b6 | 274 | spin_lock_irqsave(&gVmbusConnection.channelmsg_lock, flags); |
53af545b | 275 | list_del(&openInfo->MsgListEntry); |
dd0813b6 | 276 | spin_unlock_irqrestore(&gVmbusConnection.channelmsg_lock, flags); |
3e7ee490 | 277 | |
420beac4 | 278 | kfree(openInfo->WaitEvent); |
8c69f52a | 279 | kfree(openInfo); |
3e7ee490 HJ |
280 | |
281 | DPRINT_EXIT(VMBUS); | |
282 | ||
283 | return 0; | |
284 | } | |
285 | ||
f4266e34 GKH |
286 | /** |
287 | * DumpGpadlBody - Dump the gpadl body message to the console for debugging purposes. | |
288 | */ | |
82250213 | 289 | static void DumpGpadlBody(struct vmbus_channel_gpadl_body *Gpadl, u32 Len) |
3e7ee490 | 290 | { |
f4266e34 GKH |
291 | int i; |
292 | int pfnCount; | |
3e7ee490 | 293 | |
f4266e34 GKH |
294 | pfnCount = (Len - sizeof(struct vmbus_channel_gpadl_body)) / |
295 | sizeof(u64); | |
3e7ee490 HJ |
296 | DPRINT_DBG(VMBUS, "gpadl body - len %d pfn count %d", Len, pfnCount); |
297 | ||
f4266e34 GKH |
298 | for (i = 0; i < pfnCount; i++) |
299 | DPRINT_DBG(VMBUS, "gpadl body - %d) pfn %llu", | |
300 | i, Gpadl->Pfn[i]); | |
3e7ee490 HJ |
301 | } |
302 | ||
f4266e34 GKH |
303 | /** |
304 | * DumpGpadlHeader - Dump the gpadl header message to the console for debugging purposes. | |
305 | */ | |
82250213 | 306 | static void DumpGpadlHeader(struct vmbus_channel_gpadl_header *Gpadl) |
3e7ee490 | 307 | { |
f4266e34 GKH |
308 | int i, j; |
309 | int pageCount; | |
3e7ee490 | 310 | |
f4266e34 GKH |
311 | DPRINT_DBG(VMBUS, |
312 | "gpadl header - relid %d, range count %d, range buflen %d", | |
313 | Gpadl->ChildRelId, Gpadl->RangeCount, Gpadl->RangeBufLen); | |
314 | for (i = 0; i < Gpadl->RangeCount; i++) { | |
3e7ee490 | 315 | pageCount = Gpadl->Range[i].ByteCount >> PAGE_SHIFT; |
f4266e34 | 316 | pageCount = (pageCount > 26) ? 26 : pageCount; |
3e7ee490 | 317 | |
f4266e34 GKH |
318 | DPRINT_DBG(VMBUS, "gpadl range %d - len %d offset %d " |
319 | "page count %d", i, Gpadl->Range[i].ByteCount, | |
320 | Gpadl->Range[i].ByteOffset, pageCount); | |
3e7ee490 | 321 | |
f4266e34 GKH |
322 | for (j = 0; j < pageCount; j++) |
323 | DPRINT_DBG(VMBUS, "%d) pfn %llu", j, | |
324 | Gpadl->Range[i].PfnArray[j]); | |
3e7ee490 HJ |
325 | } |
326 | } | |
327 | ||
f4266e34 GKH |
328 | /** |
329 | * VmbusChannelCreateGpadlHeader - Creates a gpadl for the specified buffer | |
330 | */ | |
331 | static int VmbusChannelCreateGpadlHeader(void *Kbuffer, u32 Size, | |
332 | struct vmbus_channel_msginfo **MsgInfo, | |
333 | u32 *MessageCount) | |
3e7ee490 HJ |
334 | { |
335 | int i; | |
336 | int pageCount; | |
f4266e34 | 337 | unsigned long long pfn; |
82250213 GKH |
338 | struct vmbus_channel_gpadl_header *gpaHeader; |
339 | struct vmbus_channel_gpadl_body *gpadlBody; | |
aded7165 GKH |
340 | struct vmbus_channel_msginfo *msgHeader; |
341 | struct vmbus_channel_msginfo *msgBody; | |
f4266e34 | 342 | u32 msgSize; |
3e7ee490 HJ |
343 | |
344 | int pfnSum, pfnCount, pfnLeft, pfnCurr, pfnSize; | |
345 | ||
f4266e34 GKH |
346 | /* ASSERT((kbuffer & (PAGE_SIZE-1)) == 0); */ |
347 | ASSERT((Size & (PAGE_SIZE-1)) == 0); | |
3e7ee490 HJ |
348 | |
349 | pageCount = Size >> PAGE_SHIFT; | |
fa56d361 | 350 | pfn = virt_to_phys(Kbuffer) >> PAGE_SHIFT; |
3e7ee490 | 351 | |
454f18a9 | 352 | /* do we need a gpadl body msg */ |
f4266e34 GKH |
353 | pfnSize = MAX_SIZE_CHANNEL_MESSAGE - |
354 | sizeof(struct vmbus_channel_gpadl_header) - | |
355 | sizeof(struct gpa_range); | |
59471438 | 356 | pfnCount = pfnSize / sizeof(u64); |
3e7ee490 | 357 | |
f4266e34 GKH |
358 | if (pageCount > pfnCount) { |
359 | /* we need a gpadl body */ | |
454f18a9 | 360 | /* fill in the header */ |
f4266e34 GKH |
361 | msgSize = sizeof(struct vmbus_channel_msginfo) + |
362 | sizeof(struct vmbus_channel_gpadl_header) + | |
363 | sizeof(struct gpa_range) + pfnCount * sizeof(u64); | |
e276a3a5 | 364 | msgHeader = kzalloc(msgSize, GFP_KERNEL); |
3e7ee490 | 365 | |
53af545b | 366 | INIT_LIST_HEAD(&msgHeader->SubMsgList); |
f4266e34 | 367 | msgHeader->MessageSize = msgSize; |
3e7ee490 | 368 | |
82250213 | 369 | gpaHeader = (struct vmbus_channel_gpadl_header *)msgHeader->Msg; |
3e7ee490 | 370 | gpaHeader->RangeCount = 1; |
f4266e34 GKH |
371 | gpaHeader->RangeBufLen = sizeof(struct gpa_range) + |
372 | pageCount * sizeof(u64); | |
3e7ee490 HJ |
373 | gpaHeader->Range[0].ByteOffset = 0; |
374 | gpaHeader->Range[0].ByteCount = Size; | |
f4266e34 | 375 | for (i = 0; i < pfnCount; i++) |
3e7ee490 | 376 | gpaHeader->Range[0].PfnArray[i] = pfn+i; |
3e7ee490 HJ |
377 | *MsgInfo = msgHeader; |
378 | *MessageCount = 1; | |
379 | ||
380 | pfnSum = pfnCount; | |
381 | pfnLeft = pageCount - pfnCount; | |
382 | ||
454f18a9 | 383 | /* how many pfns can we fit */ |
f4266e34 GKH |
384 | pfnSize = MAX_SIZE_CHANNEL_MESSAGE - |
385 | sizeof(struct vmbus_channel_gpadl_body); | |
59471438 | 386 | pfnCount = pfnSize / sizeof(u64); |
3e7ee490 | 387 | |
454f18a9 | 388 | /* fill in the body */ |
f4266e34 | 389 | while (pfnLeft) { |
3e7ee490 | 390 | if (pfnLeft > pfnCount) |
3e7ee490 | 391 | pfnCurr = pfnCount; |
3e7ee490 | 392 | else |
3e7ee490 | 393 | pfnCurr = pfnLeft; |
3e7ee490 | 394 | |
f4266e34 GKH |
395 | msgSize = sizeof(struct vmbus_channel_msginfo) + |
396 | sizeof(struct vmbus_channel_gpadl_body) + | |
397 | pfnCurr * sizeof(u64); | |
e276a3a5 | 398 | msgBody = kzalloc(msgSize, GFP_KERNEL); |
3e7ee490 HJ |
399 | ASSERT(msgBody); |
400 | msgBody->MessageSize = msgSize; | |
401 | (*MessageCount)++; | |
f4266e34 GKH |
402 | gpadlBody = |
403 | (struct vmbus_channel_gpadl_body *)msgBody->Msg; | |
404 | ||
405 | /* | |
406 | * FIXME: | |
407 | * Gpadl is u32 and we are using a pointer which could | |
408 | * be 64-bit | |
409 | */ | |
454f18a9 | 410 | /* gpadlBody->Gpadl = kbuffer; */ |
f4266e34 | 411 | for (i = 0; i < pfnCurr; i++) |
3e7ee490 | 412 | gpadlBody->Pfn[i] = pfn + pfnSum + i; |
3e7ee490 | 413 | |
454f18a9 | 414 | /* add to msg header */ |
53af545b BP |
415 | list_add_tail(&msgBody->MsgListEntry, |
416 | &msgHeader->SubMsgList); | |
3e7ee490 HJ |
417 | pfnSum += pfnCurr; |
418 | pfnLeft -= pfnCurr; | |
419 | } | |
f4266e34 | 420 | } else { |
454f18a9 | 421 | /* everything fits in a header */ |
f4266e34 GKH |
422 | msgSize = sizeof(struct vmbus_channel_msginfo) + |
423 | sizeof(struct vmbus_channel_gpadl_header) + | |
424 | sizeof(struct gpa_range) + pageCount * sizeof(u64); | |
e276a3a5 | 425 | msgHeader = kzalloc(msgSize, GFP_KERNEL); |
f4266e34 | 426 | msgHeader->MessageSize = msgSize; |
3e7ee490 | 427 | |
82250213 | 428 | gpaHeader = (struct vmbus_channel_gpadl_header *)msgHeader->Msg; |
3e7ee490 | 429 | gpaHeader->RangeCount = 1; |
f4266e34 GKH |
430 | gpaHeader->RangeBufLen = sizeof(struct gpa_range) + |
431 | pageCount * sizeof(u64); | |
3e7ee490 HJ |
432 | gpaHeader->Range[0].ByteOffset = 0; |
433 | gpaHeader->Range[0].ByteCount = Size; | |
f4266e34 | 434 | for (i = 0; i < pageCount; i++) |
3e7ee490 | 435 | gpaHeader->Range[0].PfnArray[i] = pfn+i; |
3e7ee490 HJ |
436 | |
437 | *MsgInfo = msgHeader; | |
438 | *MessageCount = 1; | |
439 | } | |
440 | ||
441 | return 0; | |
442 | } | |
443 | ||
f4266e34 GKH |
444 | /** |
445 | * VmbusChannelEstablishGpadl - Estabish a GPADL for the specified buffer | |
446 | * | |
447 | * @Channel: a channel | |
448 | * @Kbuffer: from kmalloc | |
449 | * @Size: page-size multiple | |
450 | * @GpadlHandle: some funky thing | |
451 | */ | |
452 | int VmbusChannelEstablishGpadl(struct vmbus_channel *Channel, void *Kbuffer, | |
453 | u32 Size, u32 *GpadlHandle) | |
3e7ee490 | 454 | { |
82250213 GKH |
455 | struct vmbus_channel_gpadl_header *gpadlMsg; |
456 | struct vmbus_channel_gpadl_body *gpadlBody; | |
457 | /* struct vmbus_channel_gpadl_created *gpadlCreated; */ | |
aded7165 GKH |
458 | struct vmbus_channel_msginfo *msgInfo; |
459 | struct vmbus_channel_msginfo *subMsgInfo; | |
4d643114 | 460 | u32 msgCount; |
53af545b | 461 | struct list_head *curr; |
4d643114 | 462 | u32 nextGpadlHandle; |
dd0813b6 | 463 | unsigned long flags; |
f4266e34 | 464 | int ret; |
3e7ee490 HJ |
465 | |
466 | DPRINT_ENTER(VMBUS); | |
467 | ||
f4888417 BP |
468 | nextGpadlHandle = atomic_read(&gVmbusConnection.NextGpadlHandle); |
469 | atomic_inc(&gVmbusConnection.NextGpadlHandle); | |
3e7ee490 HJ |
470 | |
471 | VmbusChannelCreateGpadlHeader(Kbuffer, Size, &msgInfo, &msgCount); | |
472 | ASSERT(msgInfo != NULL); | |
f4266e34 | 473 | ASSERT(msgCount > 0); |
3e7ee490 | 474 | |
bfc30aae | 475 | msgInfo->WaitEvent = osd_WaitEventCreate(); |
82250213 | 476 | gpadlMsg = (struct vmbus_channel_gpadl_header *)msgInfo->Msg; |
3e7ee490 HJ |
477 | gpadlMsg->Header.MessageType = ChannelMessageGpadlHeader; |
478 | gpadlMsg->ChildRelId = Channel->OfferMsg.ChildRelId; | |
479 | gpadlMsg->Gpadl = nextGpadlHandle; | |
480 | ||
481 | DumpGpadlHeader(gpadlMsg); | |
482 | ||
dd0813b6 | 483 | spin_lock_irqsave(&gVmbusConnection.channelmsg_lock, flags); |
53af545b BP |
484 | list_add_tail(&msgInfo->MsgListEntry, |
485 | &gVmbusConnection.ChannelMsgList); | |
3e7ee490 | 486 | |
53af545b | 487 | spin_unlock_irqrestore(&gVmbusConnection.channelmsg_lock, flags); |
f4266e34 GKH |
488 | DPRINT_DBG(VMBUS, "buffer %p, size %d msg cnt %d", |
489 | Kbuffer, Size, msgCount); | |
3e7ee490 | 490 | |
f4266e34 GKH |
491 | DPRINT_DBG(VMBUS, "Sending GPADL Header - len %zd", |
492 | msgInfo->MessageSize - sizeof(*msgInfo)); | |
3e7ee490 | 493 | |
f4266e34 GKH |
494 | ret = VmbusPostMessage(gpadlMsg, msgInfo->MessageSize - |
495 | sizeof(*msgInfo)); | |
496 | if (ret != 0) { | |
3e7ee490 HJ |
497 | DPRINT_ERR(VMBUS, "Unable to open channel - %d", ret); |
498 | goto Cleanup; | |
499 | } | |
500 | ||
f4266e34 | 501 | if (msgCount > 1) { |
53af545b BP |
502 | list_for_each(curr, &msgInfo->SubMsgList) { |
503 | ||
504 | /* FIXME: should this use list_entry() instead ? */ | |
82250213 | 505 | subMsgInfo = (struct vmbus_channel_msginfo *)curr; |
f4266e34 GKH |
506 | gpadlBody = |
507 | (struct vmbus_channel_gpadl_body *)subMsgInfo->Msg; | |
3e7ee490 HJ |
508 | |
509 | gpadlBody->Header.MessageType = ChannelMessageGpadlBody; | |
510 | gpadlBody->Gpadl = nextGpadlHandle; | |
511 | ||
f4266e34 GKH |
512 | DPRINT_DBG(VMBUS, "Sending GPADL Body - len %zd", |
513 | subMsgInfo->MessageSize - | |
514 | sizeof(*subMsgInfo)); | |
3e7ee490 | 515 | |
f4266e34 GKH |
516 | DumpGpadlBody(gpadlBody, subMsgInfo->MessageSize - |
517 | sizeof(*subMsgInfo)); | |
518 | ret = VmbusPostMessage(gpadlBody, | |
519 | subMsgInfo->MessageSize - | |
520 | sizeof(*subMsgInfo)); | |
3e7ee490 HJ |
521 | ASSERT(ret == 0); |
522 | } | |
523 | } | |
bfc30aae | 524 | osd_WaitEventWait(msgInfo->WaitEvent); |
3e7ee490 | 525 | |
454f18a9 | 526 | /* At this point, we received the gpadl created msg */ |
f4266e34 GKH |
527 | DPRINT_DBG(VMBUS, "Received GPADL created " |
528 | "(relid %d, status %d handle %x)", | |
529 | Channel->OfferMsg.ChildRelId, | |
530 | msgInfo->Response.GpadlCreated.CreationStatus, | |
531 | gpadlMsg->Gpadl); | |
3e7ee490 HJ |
532 | |
533 | *GpadlHandle = gpadlMsg->Gpadl; | |
534 | ||
535 | Cleanup: | |
dd0813b6 | 536 | spin_lock_irqsave(&gVmbusConnection.channelmsg_lock, flags); |
53af545b | 537 | list_del(&msgInfo->MsgListEntry); |
dd0813b6 | 538 | spin_unlock_irqrestore(&gVmbusConnection.channelmsg_lock, flags); |
3e7ee490 | 539 | |
420beac4 | 540 | kfree(msgInfo->WaitEvent); |
8c69f52a | 541 | kfree(msgInfo); |
3e7ee490 HJ |
542 | |
543 | DPRINT_EXIT(VMBUS); | |
544 | ||
545 | return ret; | |
546 | } | |
547 | ||
f4266e34 GKH |
548 | /** |
549 | * VmbusChannelTeardownGpadl -Teardown the specified GPADL handle | |
550 | */ | |
aded7165 | 551 | int VmbusChannelTeardownGpadl(struct vmbus_channel *Channel, u32 GpadlHandle) |
3e7ee490 | 552 | { |
82250213 | 553 | struct vmbus_channel_gpadl_teardown *msg; |
aded7165 | 554 | struct vmbus_channel_msginfo *info; |
dd0813b6 | 555 | unsigned long flags; |
f4266e34 | 556 | int ret; |
3e7ee490 HJ |
557 | |
558 | DPRINT_ENTER(VMBUS); | |
559 | ||
560 | ASSERT(GpadlHandle != 0); | |
561 | ||
f4266e34 GKH |
562 | info = kmalloc(sizeof(*info) + |
563 | sizeof(struct vmbus_channel_gpadl_teardown), GFP_KERNEL); | |
3e7ee490 HJ |
564 | ASSERT(info != NULL); |
565 | ||
bfc30aae | 566 | info->WaitEvent = osd_WaitEventCreate(); |
3e7ee490 | 567 | |
82250213 | 568 | msg = (struct vmbus_channel_gpadl_teardown *)info->Msg; |
3e7ee490 HJ |
569 | |
570 | msg->Header.MessageType = ChannelMessageGpadlTeardown; | |
f4266e34 GKH |
571 | msg->ChildRelId = Channel->OfferMsg.ChildRelId; |
572 | msg->Gpadl = GpadlHandle; | |
3e7ee490 | 573 | |
dd0813b6 | 574 | spin_lock_irqsave(&gVmbusConnection.channelmsg_lock, flags); |
53af545b BP |
575 | list_add_tail(&info->MsgListEntry, |
576 | &gVmbusConnection.ChannelMsgList); | |
dd0813b6 | 577 | spin_unlock_irqrestore(&gVmbusConnection.channelmsg_lock, flags); |
3e7ee490 | 578 | |
f4266e34 GKH |
579 | ret = VmbusPostMessage(msg, |
580 | sizeof(struct vmbus_channel_gpadl_teardown)); | |
581 | if (ret != 0) { | |
454f18a9 | 582 | /* TODO: */ |
f4266e34 | 583 | /* something... */ |
3e7ee490 HJ |
584 | } |
585 | ||
bfc30aae | 586 | osd_WaitEventWait(info->WaitEvent); |
3e7ee490 | 587 | |
454f18a9 | 588 | /* Received a torndown response */ |
dd0813b6 | 589 | spin_lock_irqsave(&gVmbusConnection.channelmsg_lock, flags); |
53af545b | 590 | list_del(&info->MsgListEntry); |
dd0813b6 | 591 | spin_unlock_irqrestore(&gVmbusConnection.channelmsg_lock, flags); |
3e7ee490 | 592 | |
420beac4 | 593 | kfree(info->WaitEvent); |
8c69f52a | 594 | kfree(info); |
3e7ee490 HJ |
595 | |
596 | DPRINT_EXIT(VMBUS); | |
597 | ||
598 | return ret; | |
599 | } | |
600 | ||
f4266e34 GKH |
601 | /** |
602 | * VmbusChannelClose - Close the specified channel | |
603 | */ | |
aded7165 | 604 | void VmbusChannelClose(struct vmbus_channel *Channel) |
3e7ee490 | 605 | { |
82250213 | 606 | struct vmbus_channel_close_channel *msg; |
aded7165 | 607 | struct vmbus_channel_msginfo *info; |
0f5e44ca | 608 | unsigned long flags; |
f4266e34 | 609 | int ret; |
3e7ee490 HJ |
610 | |
611 | DPRINT_ENTER(VMBUS); | |
612 | ||
454f18a9 | 613 | /* Stop callback and cancel the timer asap */ |
3e7ee490 | 614 | Channel->OnChannelCallback = NULL; |
5996b3dd | 615 | del_timer_sync(&Channel->poll_timer); |
3e7ee490 | 616 | |
454f18a9 | 617 | /* Send a closing message */ |
f4266e34 GKH |
618 | info = kmalloc(sizeof(*info) + |
619 | sizeof(struct vmbus_channel_close_channel), GFP_KERNEL); | |
3e7ee490 HJ |
620 | ASSERT(info != NULL); |
621 | ||
bfc30aae | 622 | /* info->waitEvent = osd_WaitEventCreate(); */ |
3e7ee490 | 623 | |
82250213 | 624 | msg = (struct vmbus_channel_close_channel *)info->Msg; |
f4266e34 GKH |
625 | msg->Header.MessageType = ChannelMessageCloseChannel; |
626 | msg->ChildRelId = Channel->OfferMsg.ChildRelId; | |
3e7ee490 | 627 | |
82250213 | 628 | ret = VmbusPostMessage(msg, sizeof(struct vmbus_channel_close_channel)); |
f4266e34 | 629 | if (ret != 0) { |
454f18a9 | 630 | /* TODO: */ |
f4266e34 | 631 | /* something... */ |
3e7ee490 HJ |
632 | } |
633 | ||
454f18a9 | 634 | /* Tear down the gpadl for the channel's ring buffer */ |
3e7ee490 | 635 | if (Channel->RingBufferGpadlHandle) |
f4266e34 GKH |
636 | VmbusChannelTeardownGpadl(Channel, |
637 | Channel->RingBufferGpadlHandle); | |
3e7ee490 | 638 | |
454f18a9 | 639 | /* TODO: Send a msg to release the childRelId */ |
3e7ee490 | 640 | |
454f18a9 | 641 | /* Cleanup the ring buffers for this channel */ |
3e7ee490 HJ |
642 | RingBufferCleanup(&Channel->Outbound); |
643 | RingBufferCleanup(&Channel->Inbound); | |
644 | ||
bfc30aae | 645 | osd_PageFree(Channel->RingBufferPages, Channel->RingBufferPageCount); |
3e7ee490 | 646 | |
8c69f52a | 647 | kfree(info); |
3e7ee490 | 648 | |
454f18a9 BP |
649 | /* |
650 | * If we are closing the channel during an error path in | |
651 | * opening the channel, don't free the channel since the | |
652 | * caller will free the channel | |
653 | */ | |
654 | ||
f4266e34 | 655 | if (Channel->State == CHANNEL_OPEN_STATE) { |
0f5e44ca | 656 | spin_lock_irqsave(&gVmbusConnection.channel_lock, flags); |
53af545b | 657 | list_del(&Channel->ListEntry); |
0f5e44ca | 658 | spin_unlock_irqrestore(&gVmbusConnection.channel_lock, flags); |
3e7ee490 HJ |
659 | |
660 | FreeVmbusChannel(Channel); | |
661 | } | |
662 | ||
663 | DPRINT_EXIT(VMBUS); | |
664 | } | |
665 | ||
f4266e34 GKH |
666 | /** |
667 | * VmbusChannelSendPacket - Send the specified buffer on the given channel | |
668 | */ | |
669 | int VmbusChannelSendPacket(struct vmbus_channel *Channel, const void *Buffer, | |
670 | u32 BufferLen, u64 RequestId, | |
671 | enum vmbus_packet_type Type, u32 Flags) | |
3e7ee490 | 672 | { |
8dc0a06a GKH |
673 | struct vmpacket_descriptor desc; |
674 | u32 packetLen = sizeof(struct vmpacket_descriptor) + BufferLen; | |
59471438 | 675 | u32 packetLenAligned = ALIGN_UP(packetLen, sizeof(u64)); |
b219b3f7 | 676 | struct scatterlist bufferList[3]; |
f4266e34 GKH |
677 | u64 alignedData = 0; |
678 | int ret; | |
3e7ee490 HJ |
679 | |
680 | DPRINT_ENTER(VMBUS); | |
f4266e34 GKH |
681 | DPRINT_DBG(VMBUS, "channel %p buffer %p len %d", |
682 | Channel, Buffer, BufferLen); | |
3e7ee490 HJ |
683 | |
684 | DumpVmbusChannel(Channel); | |
685 | ||
59471438 | 686 | ASSERT((packetLenAligned - packetLen) < sizeof(u64)); |
3e7ee490 | 687 | |
454f18a9 BP |
688 | /* Setup the descriptor */ |
689 | desc.Type = Type; /* VmbusPacketTypeDataInBand; */ | |
690 | desc.Flags = Flags; /* VMBUS_DATA_PACKET_FLAG_COMPLETION_REQUESTED; */ | |
f4266e34 GKH |
691 | /* in 8-bytes granularity */ |
692 | desc.DataOffset8 = sizeof(struct vmpacket_descriptor) >> 3; | |
454f18a9 BP |
693 | desc.Length8 = (u16)(packetLenAligned >> 3); |
694 | desc.TransactionId = RequestId; | |
3e7ee490 | 695 | |
f4266e34 | 696 | sg_init_table(bufferList, 3); |
8dc0a06a | 697 | sg_set_buf(&bufferList[0], &desc, sizeof(struct vmpacket_descriptor)); |
b219b3f7 NP |
698 | sg_set_buf(&bufferList[1], Buffer, BufferLen); |
699 | sg_set_buf(&bufferList[2], &alignedData, packetLenAligned - packetLen); | |
3e7ee490 | 700 | |
f4266e34 | 701 | ret = RingBufferWrite(&Channel->Outbound, bufferList, 3); |
3e7ee490 | 702 | |
454f18a9 | 703 | /* TODO: We should determine if this is optional */ |
3e7ee490 | 704 | if (ret == 0 && !GetRingBufferInterruptMask(&Channel->Outbound)) |
3e7ee490 | 705 | VmbusChannelSetEvent(Channel); |
3e7ee490 HJ |
706 | |
707 | DPRINT_EXIT(VMBUS); | |
708 | ||
709 | return ret; | |
710 | } | |
711 | ||
f4266e34 GKH |
712 | /** |
713 | * VmbusChannelSendPacketPageBuffer - Send a range of single-page buffer packets using a GPADL Direct packet type. | |
714 | */ | |
aded7165 | 715 | int VmbusChannelSendPacketPageBuffer(struct vmbus_channel *Channel, |
f4266e34 GKH |
716 | struct hv_page_buffer PageBuffers[], |
717 | u32 PageCount, void *Buffer, u32 BufferLen, | |
718 | u64 RequestId) | |
3e7ee490 | 719 | { |
f4266e34 GKH |
720 | int ret; |
721 | int i; | |
0cf4fa80 | 722 | struct VMBUS_CHANNEL_PACKET_PAGE_BUFFER desc; |
4d643114 GKH |
723 | u32 descSize; |
724 | u32 packetLen; | |
725 | u32 packetLenAligned; | |
b219b3f7 | 726 | struct scatterlist bufferList[3]; |
f4266e34 | 727 | u64 alignedData = 0; |
3e7ee490 HJ |
728 | |
729 | DPRINT_ENTER(VMBUS); | |
730 | ||
731 | ASSERT(PageCount <= MAX_PAGE_BUFFER_COUNT); | |
732 | ||
733 | DumpVmbusChannel(Channel); | |
734 | ||
f4266e34 GKH |
735 | /* |
736 | * Adjust the size down since VMBUS_CHANNEL_PACKET_PAGE_BUFFER is the | |
737 | * largest size we support | |
738 | */ | |
739 | descSize = sizeof(struct VMBUS_CHANNEL_PACKET_PAGE_BUFFER) - | |
740 | ((MAX_PAGE_BUFFER_COUNT - PageCount) * | |
741 | sizeof(struct hv_page_buffer)); | |
3e7ee490 | 742 | packetLen = descSize + BufferLen; |
59471438 | 743 | packetLenAligned = ALIGN_UP(packetLen, sizeof(u64)); |
3e7ee490 | 744 | |
59471438 | 745 | ASSERT((packetLenAligned - packetLen) < sizeof(u64)); |
3e7ee490 | 746 | |
454f18a9 | 747 | /* Setup the descriptor */ |
3e7ee490 HJ |
748 | desc.Type = VmbusPacketTypeDataUsingGpaDirect; |
749 | desc.Flags = VMBUS_DATA_PACKET_FLAG_COMPLETION_REQUESTED; | |
454f18a9 BP |
750 | desc.DataOffset8 = descSize >> 3; /* in 8-bytes grandularity */ |
751 | desc.Length8 = (u16)(packetLenAligned >> 3); | |
752 | desc.TransactionId = RequestId; | |
3e7ee490 HJ |
753 | desc.RangeCount = PageCount; |
754 | ||
f4266e34 | 755 | for (i = 0; i < PageCount; i++) { |
3e7ee490 HJ |
756 | desc.Range[i].Length = PageBuffers[i].Length; |
757 | desc.Range[i].Offset = PageBuffers[i].Offset; | |
758 | desc.Range[i].Pfn = PageBuffers[i].Pfn; | |
759 | } | |
760 | ||
f4266e34 | 761 | sg_init_table(bufferList, 3); |
b219b3f7 NP |
762 | sg_set_buf(&bufferList[0], &desc, descSize); |
763 | sg_set_buf(&bufferList[1], Buffer, BufferLen); | |
764 | sg_set_buf(&bufferList[2], &alignedData, packetLenAligned - packetLen); | |
3e7ee490 | 765 | |
f4266e34 | 766 | ret = RingBufferWrite(&Channel->Outbound, bufferList, 3); |
3e7ee490 | 767 | |
454f18a9 | 768 | /* TODO: We should determine if this is optional */ |
3e7ee490 | 769 | if (ret == 0 && !GetRingBufferInterruptMask(&Channel->Outbound)) |
3e7ee490 | 770 | VmbusChannelSetEvent(Channel); |
3e7ee490 HJ |
771 | |
772 | DPRINT_EXIT(VMBUS); | |
773 | ||
774 | return ret; | |
775 | } | |
776 | ||
f4266e34 GKH |
777 | /** |
778 | * VmbusChannelSendPacketMultiPageBuffer - Send a multi-page buffer packet using a GPADL Direct packet type. | |
779 | */ | |
aded7165 | 780 | int VmbusChannelSendPacketMultiPageBuffer(struct vmbus_channel *Channel, |
f4266e34 GKH |
781 | struct hv_multipage_buffer *MultiPageBuffer, |
782 | void *Buffer, u32 BufferLen, u64 RequestId) | |
3e7ee490 | 783 | { |
f4266e34 | 784 | int ret; |
3fcc523a | 785 | struct VMBUS_CHANNEL_PACKET_MULITPAGE_BUFFER desc; |
4d643114 GKH |
786 | u32 descSize; |
787 | u32 packetLen; | |
788 | u32 packetLenAligned; | |
b219b3f7 | 789 | struct scatterlist bufferList[3]; |
f4266e34 GKH |
790 | u64 alignedData = 0; |
791 | u32 PfnCount = NUM_PAGES_SPANNED(MultiPageBuffer->Offset, | |
792 | MultiPageBuffer->Length); | |
3e7ee490 HJ |
793 | |
794 | DPRINT_ENTER(VMBUS); | |
795 | ||
796 | DumpVmbusChannel(Channel); | |
797 | ||
f4266e34 GKH |
798 | DPRINT_DBG(VMBUS, "data buffer - offset %u len %u pfn count %u", |
799 | MultiPageBuffer->Offset, MultiPageBuffer->Length, PfnCount); | |
3e7ee490 HJ |
800 | |
801 | ASSERT(PfnCount > 0); | |
802 | ASSERT(PfnCount <= MAX_MULTIPAGE_BUFFER_COUNT); | |
803 | ||
f4266e34 GKH |
804 | /* |
805 | * Adjust the size down since VMBUS_CHANNEL_PACKET_MULITPAGE_BUFFER is | |
806 | * the largest size we support | |
807 | */ | |
808 | descSize = sizeof(struct VMBUS_CHANNEL_PACKET_MULITPAGE_BUFFER) - | |
809 | ((MAX_MULTIPAGE_BUFFER_COUNT - PfnCount) * | |
810 | sizeof(u64)); | |
3e7ee490 | 811 | packetLen = descSize + BufferLen; |
59471438 | 812 | packetLenAligned = ALIGN_UP(packetLen, sizeof(u64)); |
3e7ee490 | 813 | |
59471438 | 814 | ASSERT((packetLenAligned - packetLen) < sizeof(u64)); |
3e7ee490 | 815 | |
454f18a9 | 816 | /* Setup the descriptor */ |
3e7ee490 HJ |
817 | desc.Type = VmbusPacketTypeDataUsingGpaDirect; |
818 | desc.Flags = VMBUS_DATA_PACKET_FLAG_COMPLETION_REQUESTED; | |
454f18a9 BP |
819 | desc.DataOffset8 = descSize >> 3; /* in 8-bytes grandularity */ |
820 | desc.Length8 = (u16)(packetLenAligned >> 3); | |
821 | desc.TransactionId = RequestId; | |
3e7ee490 HJ |
822 | desc.RangeCount = 1; |
823 | ||
824 | desc.Range.Length = MultiPageBuffer->Length; | |
825 | desc.Range.Offset = MultiPageBuffer->Offset; | |
826 | ||
f4266e34 GKH |
827 | memcpy(desc.Range.PfnArray, MultiPageBuffer->PfnArray, |
828 | PfnCount * sizeof(u64)); | |
3e7ee490 | 829 | |
f4266e34 | 830 | sg_init_table(bufferList, 3); |
b219b3f7 NP |
831 | sg_set_buf(&bufferList[0], &desc, descSize); |
832 | sg_set_buf(&bufferList[1], Buffer, BufferLen); | |
833 | sg_set_buf(&bufferList[2], &alignedData, packetLenAligned - packetLen); | |
3e7ee490 | 834 | |
f4266e34 | 835 | ret = RingBufferWrite(&Channel->Outbound, bufferList, 3); |
3e7ee490 | 836 | |
454f18a9 | 837 | /* TODO: We should determine if this is optional */ |
3e7ee490 | 838 | if (ret == 0 && !GetRingBufferInterruptMask(&Channel->Outbound)) |
3e7ee490 | 839 | VmbusChannelSetEvent(Channel); |
3e7ee490 HJ |
840 | |
841 | DPRINT_EXIT(VMBUS); | |
842 | ||
843 | return ret; | |
844 | } | |
845 | ||
f4266e34 GKH |
846 | /** |
847 | * VmbusChannelRecvPacket - Retrieve the user packet on the specified channel | |
848 | */ | |
454f18a9 | 849 | /* TODO: Do we ever receive a gpa direct packet other than the ones we send ? */ |
f4266e34 GKH |
850 | int VmbusChannelRecvPacket(struct vmbus_channel *Channel, void *Buffer, |
851 | u32 BufferLen, u32 *BufferActualLen, u64 *RequestId) | |
3e7ee490 | 852 | { |
8dc0a06a | 853 | struct vmpacket_descriptor desc; |
4d643114 GKH |
854 | u32 packetLen; |
855 | u32 userLen; | |
3e7ee490 | 856 | int ret; |
54411c42 | 857 | unsigned long flags; |
3e7ee490 HJ |
858 | |
859 | DPRINT_ENTER(VMBUS); | |
860 | ||
861 | *BufferActualLen = 0; | |
862 | *RequestId = 0; | |
863 | ||
54411c42 | 864 | spin_lock_irqsave(&Channel->inbound_lock, flags); |
3e7ee490 | 865 | |
f4266e34 GKH |
866 | ret = RingBufferPeek(&Channel->Inbound, &desc, |
867 | sizeof(struct vmpacket_descriptor)); | |
868 | if (ret != 0) { | |
54411c42 | 869 | spin_unlock_irqrestore(&Channel->inbound_lock, flags); |
3e7ee490 | 870 | |
454f18a9 | 871 | /* DPRINT_DBG(VMBUS, "nothing to read!!"); */ |
3e7ee490 HJ |
872 | DPRINT_EXIT(VMBUS); |
873 | return 0; | |
874 | } | |
875 | ||
454f18a9 | 876 | /* VmbusChannelClearEvent(Channel); */ |
3e7ee490 HJ |
877 | |
878 | packetLen = desc.Length8 << 3; | |
879 | userLen = packetLen - (desc.DataOffset8 << 3); | |
454f18a9 | 880 | /* ASSERT(userLen > 0); */ |
3e7ee490 | 881 | |
f4266e34 GKH |
882 | DPRINT_DBG(VMBUS, "packet received on channel %p relid %d <type %d " |
883 | "flag %d tid %llx pktlen %d datalen %d> ", | |
884 | Channel, Channel->OfferMsg.ChildRelId, desc.Type, | |
885 | desc.Flags, desc.TransactionId, packetLen, userLen); | |
3e7ee490 HJ |
886 | |
887 | *BufferActualLen = userLen; | |
888 | ||
f4266e34 | 889 | if (userLen > BufferLen) { |
54411c42 | 890 | spin_unlock_irqrestore(&Channel->inbound_lock, flags); |
3e7ee490 | 891 | |
f4266e34 GKH |
892 | DPRINT_ERR(VMBUS, "buffer too small - got %d needs %d", |
893 | BufferLen, userLen); | |
3e7ee490 HJ |
894 | DPRINT_EXIT(VMBUS); |
895 | ||
896 | return -1; | |
897 | } | |
898 | ||
899 | *RequestId = desc.TransactionId; | |
900 | ||
454f18a9 | 901 | /* Copy over the packet to the user buffer */ |
f4266e34 GKH |
902 | ret = RingBufferRead(&Channel->Inbound, Buffer, userLen, |
903 | (desc.DataOffset8 << 3)); | |
3e7ee490 | 904 | |
54411c42 | 905 | spin_unlock_irqrestore(&Channel->inbound_lock, flags); |
3e7ee490 HJ |
906 | |
907 | DPRINT_EXIT(VMBUS); | |
908 | ||
909 | return 0; | |
910 | } | |
911 | ||
f4266e34 GKH |
912 | /** |
913 | * VmbusChannelRecvPacketRaw - Retrieve the raw packet on the specified channel | |
914 | */ | |
915 | int VmbusChannelRecvPacketRaw(struct vmbus_channel *Channel, void *Buffer, | |
916 | u32 BufferLen, u32 *BufferActualLen, | |
917 | u64 *RequestId) | |
3e7ee490 | 918 | { |
8dc0a06a | 919 | struct vmpacket_descriptor desc; |
4d643114 GKH |
920 | u32 packetLen; |
921 | u32 userLen; | |
3e7ee490 | 922 | int ret; |
54411c42 | 923 | unsigned long flags; |
3e7ee490 HJ |
924 | |
925 | DPRINT_ENTER(VMBUS); | |
926 | ||
927 | *BufferActualLen = 0; | |
928 | *RequestId = 0; | |
929 | ||
54411c42 | 930 | spin_lock_irqsave(&Channel->inbound_lock, flags); |
3e7ee490 | 931 | |
f4266e34 GKH |
932 | ret = RingBufferPeek(&Channel->Inbound, &desc, |
933 | sizeof(struct vmpacket_descriptor)); | |
934 | if (ret != 0) { | |
54411c42 | 935 | spin_unlock_irqrestore(&Channel->inbound_lock, flags); |
3e7ee490 | 936 | |
454f18a9 | 937 | /* DPRINT_DBG(VMBUS, "nothing to read!!"); */ |
3e7ee490 HJ |
938 | DPRINT_EXIT(VMBUS); |
939 | return 0; | |
940 | } | |
941 | ||
454f18a9 | 942 | /* VmbusChannelClearEvent(Channel); */ |
3e7ee490 HJ |
943 | |
944 | packetLen = desc.Length8 << 3; | |
945 | userLen = packetLen - (desc.DataOffset8 << 3); | |
946 | ||
f4266e34 GKH |
947 | DPRINT_DBG(VMBUS, "packet received on channel %p relid %d <type %d " |
948 | "flag %d tid %llx pktlen %d datalen %d> ", | |
949 | Channel, Channel->OfferMsg.ChildRelId, desc.Type, | |
950 | desc.Flags, desc.TransactionId, packetLen, userLen); | |
3e7ee490 HJ |
951 | |
952 | *BufferActualLen = packetLen; | |
953 | ||
f4266e34 | 954 | if (packetLen > BufferLen) { |
54411c42 | 955 | spin_unlock_irqrestore(&Channel->inbound_lock, flags); |
3e7ee490 | 956 | |
f4266e34 GKH |
957 | DPRINT_ERR(VMBUS, "buffer too small - needed %d bytes but " |
958 | "got space for only %d bytes", packetLen, BufferLen); | |
3e7ee490 HJ |
959 | DPRINT_EXIT(VMBUS); |
960 | return -2; | |
961 | } | |
962 | ||
963 | *RequestId = desc.TransactionId; | |
964 | ||
454f18a9 | 965 | /* Copy over the entire packet to the user buffer */ |
3e7ee490 HJ |
966 | ret = RingBufferRead(&Channel->Inbound, Buffer, packetLen, 0); |
967 | ||
54411c42 | 968 | spin_unlock_irqrestore(&Channel->inbound_lock, flags); |
3e7ee490 HJ |
969 | |
970 | DPRINT_EXIT(VMBUS); | |
971 | ||
972 | return 0; | |
973 | } | |
974 | ||
f4266e34 GKH |
975 | /** |
976 | * VmbusChannelOnChannelEvent - Channel event callback | |
977 | */ | |
aded7165 | 978 | void VmbusChannelOnChannelEvent(struct vmbus_channel *Channel) |
3e7ee490 HJ |
979 | { |
980 | DumpVmbusChannel(Channel); | |
981 | ASSERT(Channel->OnChannelCallback); | |
5996b3dd | 982 | |
3e7ee490 | 983 | Channel->OnChannelCallback(Channel->ChannelCallbackContext); |
5996b3dd HZ |
984 | |
985 | mod_timer(&Channel->poll_timer, jiffies + usecs_to_jiffies(100)); | |
3e7ee490 HJ |
986 | } |
987 | ||
f4266e34 GKH |
988 | /** |
989 | * VmbusChannelOnTimer - Timer event callback | |
990 | */ | |
46a05253 | 991 | void VmbusChannelOnTimer(unsigned long data) |
3e7ee490 | 992 | { |
aded7165 | 993 | struct vmbus_channel *channel = (struct vmbus_channel *)data; |
3e7ee490 | 994 | |
0fa37b1e | 995 | if (channel->OnChannelCallback) |
3e7ee490 | 996 | channel->OnChannelCallback(channel->ChannelCallbackContext); |
3e7ee490 HJ |
997 | } |
998 | ||
f4266e34 GKH |
999 | /** |
1000 | * DumpVmbusChannel - Dump vmbus channel info to the console | |
1001 | */ | |
aded7165 | 1002 | static void DumpVmbusChannel(struct vmbus_channel *Channel) |
3e7ee490 HJ |
1003 | { |
1004 | DPRINT_DBG(VMBUS, "Channel (%d)", Channel->OfferMsg.ChildRelId); | |
1005 | DumpRingInfo(&Channel->Outbound, "Outbound "); | |
1006 | DumpRingInfo(&Channel->Inbound, "Inbound "); | |
1007 | } |